How To Fix MDG_MDF311 - &1 is already used in hierarchies; assignment not possible

MDG_MDF311 - Overview

• Message type: E = Error

• Message class: MDG_MDF - Master Data: Messages

• Message number: 311

• Message text: &1 is already used in hierarchies; assignment not possible

What causes this issue?

Only those characteristic values can be assigned to another
characteristic as delta nodes that are not used anywhere else in
hierarchies. But &v1& is used since period &v3& in hierarchies of
version &v4& below node &v2&.

System Response

&v1& cannot be used at present as a delta node.

How to fix this error?

Assign another delta node.
Or delete all usages of this characterisitc value in hierarchies.
Subsequently this value can be used as a delta node.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MDG_MDF311 - &1 is already used in hierarchies; assignment not possible ?

  The SAP error message MDG_MDF311 indicates that an entity (such as a master data object) you are trying to assign or modify is already being used in one or more hierarchies. This means that the system is preventing you from making changes to this entity because it is currently linked to existing hierarchical structures.
  
  Cause:
  
  Existing Hierarchies: The entity you are trying to modify or delete is already part of one or more hierarchies in the system.
  Data Integrity: SAP enforces data integrity rules to ensure that changes do not disrupt existing relationships and structures within the master data framework.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Identify Hierarchies:
  
  Check which hierarchies the entity is currently part of. You can do this by navigating to the relevant master data management transaction or using reports that list hierarchies and their members.
  
  
  
  Remove from Hierarchies:
  
  If you need to modify or delete the entity, you may first